Results 101 to 110 of about 102,319 (250)

Compact Nuclei in Galaxies at Moderate Redshift:II. Their Nature and Implications for the AGN Luminosity Function

, 1998
This study explores the space density and properties of active galaxies to z=0.8. We have investigated the frequency and nature of unresolved nuclei in galaxies at moderate redshift as indicators of nuclear activity such as Active Galactic Nuclei (AGN ...
Avni Y., Boyle B. J., Boyle B. J., Chen L.-W., Cheney J. E., Cheng F. Z., Hasinger G., Kalinkov M., Kavan Ratnatunga, Kotilainen J. K., Richard E. Griffiths, Richard F. Green, Tresse L., Vicki L. Sarajedini   +13 more
core   +1 more source

Superassociations in the Arms of Normal and Active Galaxies [PDF]

, 1987
Jorge Melnick
openalex   +1 more source

Different Dependence of Narrow Hα Line Luminosity on Optical Continuum Luminosity between Star-forming Galaxies and Type 2 Active Galactic Nuclei: Globally Negative AGN Feedback in Local Type 2 AGN?

The Astrophysical Journal
In this manuscript, clues are provided to support globally negative active galactic nuclei (AGN) feedback on star formation in the host galaxies of the local low-redshift Sloan Digital Sky Survey (SDSS) Type 2 AGN, based on the different dependence of ...
XueGuang Zhang
doaj   +1 more source

The Extended Ionized Nebulosities Surrounding the Active Galaxies NGC 6215, A 0945-30 and MCG-2-58-22 [PDF]

, 1989
Florence Durret
openalex   +1 more source

Infrared 3D Observations of Nearby Active Galaxies [PDF]

, 1999
We present multi-wavelength imaging observations of three nearby and famous active galaxies obtained with NICMOS, ISOCAM and the MPE near-IR integral field spectrometer.
Alonso-Herrero, A., Lutz, D., Maiolino, R., Marconi, A., Thatte, N.   +4 more
core   +2 more sources

Lists of Active Galaxies, Problems of Detection and Statistics [PDF]

, 1987
R. D. Cannon
openalex   +1 more source

Millimetre measurements of hard X-ray selected active galaxies: implications for the nature of the continuous spectrum [PDF]

, 1991
A. Lawrence, M. Rowan-Robinson, A. Efstathiou, M. J. Ward, M. Elvis, M. G. Smith, W. D. Duncan, E. I. Robson   +7 more
openalex   +1 more source

The Role of Active Galactic Nucleus Winds in Galaxy Formation: Connecting AGN Outflows at Low Redshifts to the Formation/Evolution of Their Host Galaxies

The Astronomical Journal
Using Sloan Digital Sky Survey (SDSS) spectra, we applied an automatic method to search for outflows (OFs) in three large samples of narrow-line active galactic nuclei (AGN) at low redshifts ( z < 0.4), separated into three spectral activity classes ...
Juan Pablo Torres-Papaqui, Roger Coziol, Aitor C. Robleto-Orús, Karla A. Cutiva-Alvarez, Paulina Roco-Avilez   +4 more
doaj   +1 more source

Optical properties of active galaxies with ultra-soft X-ray spectra [PDF]

, 1992
E. M. Puchnarewicz, K. O. Mason, F. Cordova, J. F. Kartje, G. Branduardi‐Raymont, J. P. D. Mittaz, Paul Murdin, J. R. Allington‐Smith   +7 more
openalex   +1 more source

The Nucleus of Our Home Galaxy: A Remnant of an Active or a Starburst Galaxy? [PDF]

, 1994
L. M. Ozernoy
openalex   +1 more source